Valve.



A. E. SMITH.

VALVE.

APPLICATION FILED SEPT. 20, 1913.

Patentoi Jan 5, 1915.

2 SHEETSSHEET 1.

A. E. SMITH.

VALVE.

APPLICATION FILED SEPT. 20, 1913.

Patented m 5, 1915.

2 SHBETS-BHEET 2.

Itt

tiff

ATFRED E. SMITH, F BOSTON, IVfAfiiSACI-IUSET'JLKQ:

VALVE.

tpeclflcation of Letters JPatent.

Patented Jan. 5, 1%15.

the same.

The present invention relates to an improvement in valves or gates.

The objects of the invention are to produce a valveof improvedconstruction and operation having the capacity of quick opening to fullpipe area, quick closing, absence of portions liable to catch dirt andthereby interfere with the opening or the seating of the valve, andother features of construction hereinafter described.

To these ends the invention consists in the valve hereinafter describedand particularly defined in the claims.

Tn the accompanying drawings illustrating the preferred form of theinvention, Figure 1 is a side elevation showing the valve closed; Fig. 2is a sectional elevation showing the valve open; and Fig. 3 is a plan ofthe valve in closed position.

The illustrated embodiment of the invention is described as follows Thebody 1 of the valve is screwthreaded at its end to screw on'a pipe ornipple. The valve mouth or orifice 3 is arranged at an angle to the axisof the valve body and has a plane valve seat around it. The valve disk 4for closing the valve orifice is provided with a rubber )acking disk 5secured by a follower 6 to the disk 4, a screw 7 passlng through thefollower and taking into the disk to hold the packing in place. Thevalve disk 4. is provided with two cars 8 between which one end of alink 9 is pivoted. The other end of the link 9 is pivotally mounted onthe cars 10 projecting forward from the upper side of the valve body 1.The link 9 upon its lower end is rovided with a projection 11 which is aapted to engage the outside surface of the valve disk 4 so as to causethe disk, when drawn toward its seat, to be presented squarely to theseat. To the sides of the disk are pivotally attached links 12 whichextend rearwardly and upwardly and pass through holes in the crank pins13 supported in the crank arms 1% mounted set screws.

uplon the "opposite ends of'the rock shaft 15 w ich 1s supported in thecars 16 projected upward .from the upper side of the valve body. Beyondthe crank pins 13 the links 12 are embraced by s iral springs 17 whichengage the crank pins 13 at their-lower ends and the washers 18 at theirupper ends, the nuts 19 taking the spring pressure. A handle 20 ismounted on the rock shaft 15 between the cars 16, and the cranks 1t andthe handle 20 are secured to-the rock shaft by When the handle 20 ismoved from the position shown in Fig. 2 to the position shown in Fig; 1,the, links 12 are pulled upon and act to draw the valve disk 4 to itsseat onthe valve body. The above described arrangement is such that thelinks 12 and crank arms 14 form a toggle acting when the valve is closedto lock it closed, the links 12 passing slightly beyond the center ofthe rock shaft 15. Pine 21 engage the set screws in the arms 14:andlimit the looking throw of the handle 20. Nuts 22 on the links 12 aretightly held in position thereon and act as abutments for the crank pins13 during the opening of the valve, thus, when the handle 20 is movedfrom the position shown in Fig. 1' to the position shown in Fig. 2, thecrank pins 13 engage the nuts 22 and transmit pressure to the links 12,so as thereby positively to move the valve disk in the direction toopenit.

The extreme end of the valve body is provided with a hood 23 securedthereon by screws, which prevents upward squirtin or spattering ofliquid issuing from the orifice of the valve.

lit will be observed that the present valve is free from cavities orprojections which would catch or collect sediment or solid materialbeing discharged through the valve, and that the liquid dischargedthrough the valve does not run with pressure over the valve seat wherebyerosion of the seat is avoided and the durability of the valve enhanced.The valve disk is held to its seat by a resilient linkage havingprovision for the regulation of the closing pressure. With the gradualthinning .of the packing disk 5 by use, the readjustment of the linkageby which the valve is operated is not necessitated, as the yielding ofthe springs 17 compensates for such gradual thinning of the packingdisk. ln this connection it is to be observed that the packing disk maybe renewed without dismantling the valve by simply removing thefollower, utting on a, ew packing disk and replacing the follower inposition. The mouth of the valve being inclined to the axis of the valvebody, the pull of the links on the valve disk is substantially in adirection at right angles to the valve seat, so the valve is securelyheld to its seat and at the same time a movement through a comparativelysmall arc is suiiicient to move the valve from its seat a distance suchthat the full 'area of the pipe is opened.

This valve is particularly adapted for use in connection with washingmachines for laundries, by reason of the features of constructionhereinbefore referred to, and particularly because it opens to full areaquickly,

closes quickly, holds the valve closed with a yielding pressure so thateven when the packing has become worn the valve is tightly closed, doesnot collect any sediment upon the valve seat, nor subject such seat toerosive action of the li aids, and at the same time it is securely cosed and locked by a simple and quickly performed movement of thehandle.

Having thus described the invention, what' is claimed is I 1. A valvehaving, in combination, a valve body having a straight passageterminating in an inclined external mouth, a valve disk supported on aivot outside of the valve body, a rock shaft mounted on the exterior ofthe valve body and provided with crank arms, and links connecting thevalve disk and the crank-arms, substantially as described.

2'. A valve having, in combination, a valve body having a straightpassage terminating in an inclined external mouth, a valve disk, pivotalsupporting means for the disk located on the end of the valve body andexternal to it, a rock shaft mounted on the outside of the valve bodyand provided with crank arms, links connecting the valve disk and thecrank arm provided with springs through which the pressure of the linksupon the disk is transmitted so that the disk is normally held by sprinressul'e against the mouth of the valve b0 y, substantially asdescribed.

3. A valve having, in combination, a valve body having a straightpassage terminating in an inclined mouth, a valve disk pivotallysupported upon the valve body and external thereto, a rock shaft mountedexternally upon the body and provided with crank arms, resilient linkageconnecting the valve disk and crank arms, the length of the crank armsand links and the position of the rock shaft being such with relation tothe valve mouth that when the rock shaft is turned to cause the disk tobe drawn against the mouth of the valve body the crank arms will swinginto the lane of the links and between them there y locking the valvedisk against the mouth of the valve body by spring pressure,substantially as described.

4:. A valve havin in combination, a valve body rovided wit a passageterminating in an inclined mouth, a valve disk for closing the mouth, anear mounted on the end of the valve body and projecting outwardltherefrom beyond the valve mouth, a lin pivotally supported at one endupon the ear and pivotally carrying upon its other end said valve disk,the valve body being provided with external ears located at a distancefrom the valve mouth and on the side of the valve body opposite themouth, a

rock shaft supported in said ears, crank arms mounted on the rock shaft,links connecting the crank arms and valve disk, and a handle mounted onthe rock shaft by which the valve disk may be 0 ened and closed,substantially as describe ALFRED E. SMITH.

Witnesses:

Hoimcn VAN EMREN, GEO. E. STEBBINS.

